Power-hoist.



A. G. VAN DE VELDE.

POWER HOIST.

APPLICATION FILED FEB. 29, 1912.

Patented Feb. 10, 19M

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r27 ey Wvffiesses A. G. VAN DE VELDE.

POWER HOIST.

APPLICATION FILED 113.29, 1912.

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Wklvesses.

UNITED STATES PATENT OFFICE.

ABRAHAM o. VAN DE vELnE, or CHICAGO, ILLINOIS.

POWER-HOIST.

Application filed February 29, 1912.

To all whom it may concern:

Be it known that I, ABRAHAM C. VAN DE VELDE, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented a new and Improved Power-Hoist, of which the following is a full, clear, and exact clescription and specification.

The invention relates to improvements in hoisting machines and its object is to provide a new and improved hoist having an electric motor provided with a revolving armature and a stationary field or other motive power.

The invention consists of novel features and parts and combinations of the same, which will be more fully described hereinafter and then pointed out in the claims.

My invention relates to an improved power hoist and is designed to provide a hoist of this character which is simple and compact in construction and capable of being easily and conveniently operated.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification in which similar characters of reference indicate corresponding parts in different figures of the drawings.

Figure 1 is a view in side elevation of this improvement with parts broken away. Fig. 2 is a view in end elevation of the same with parts broken away. Fig. 3 is a view in section taken on the line aa of Fig. 2. Fig. 4; is a view in section taken on the line b-b of Fig. 3. Fig. 5 is a detail view in end elevation of the ear case, brake and operating means there or.

In accordance with this invention a carriage 1 is mounted to travel on a beam or track A. The hoist is suspended by a lug 2 centrally depending from the carriage 1 to which is attached the frame 6 by a bolt passing through apertures 3 in the lugs 4 upon the top of the frame 6 embracing the lug 2. A power shaft 5 is mounted centrally of the frame 6 extending in the direction of travel of the carriage supported at one end by a bearing in the frame. An armature 7 is se cured to the power shaft 5 by a key 8, washers 9 on each end thereof, and a nut 10 on the end adjacent the frame bearing, the opposite washer abut-ting a shoulder on the power shaft and is adapted to rotate between fixed fields carried by the frame. A

Specification of Letters Patent.

Patented Feb. 10, 1914.

Serial No. 680,771.

commutator 11 is secured to the power shaft 5 between the frame bearing and armature 7 by end plates 12 tapped and screwed upon the shaft which support between them armature bars 14. At the other end of the power shaft a gear casing 15 is keyed thereto, which gear case is adapted to rotate upon ball bearings 23 between the gear case and a fixed sleeve 16 in line with the power shaft 5 keyed in the bracket 24 secured to the frame 6. The sleeve 16 enters within the gear case and is provided upon its inner end with a fixed gear 22. The driving shaft 27 is mountedwithin the sleeve 16 and is provided upon its inner end with a fixed gear 19 and upon its outer end with a driving pinion 28. Oppositely disposed pairs of gear wheels 17, 18 and 20, 21 are mounted on pins 26 secured between the walls of the gear casing and so arranged that each pair rotate together with gears 17 and 20 in mesh with gear 19 on the driving shaft and gears 18 and 21 in mesh with the fixed gear 22. As the number of teeth on gears 17 and 20 may differ from the number of teeth on gears 18 and 21 a great reduction of speed may be obtained. The gear casing 15 is so constructed that it may be filled with a lubricant in which all of the inclosed gears will work.

The frame 6 is provided on each side with outstanding bearings 25 upon which are mounted to rotate dish shaped driving gears 29 which are constructed to form in efiiect a casing for the frame and gear case by providing the teeth upon the adjacent edges. The teeth on the driving gear 29 engage on opposite sides with the driving pinion 28 so that they will rotate in opposite directions. Each of the driving gears 29 are provided about the bearings 25 with outstanding chain pulleys 30 over which pass in opposite directions hoisting chains supporting be tween their ends a bar 31 and a load engaging hook 32.

To control the hoist the following construction is employed. Upon the bottom of the frame 6 depending bearings 43 are provided for the shaft 10 extending parallel with the power shaft 5 and beyond one bearing under the bracket 24. Upon shaft 40 intermediate the bearings therefor is secured a pulley wheel 34 over which passes the rope 33 with its ends hanging free upon either side of the pulley. Upon the bottom of frame 6 on each side of shaft 40 are arranged stationary jaw members 36 and 39 of an electric switch with the members of each pair on opposite sides of the pulley wheel 34. The respective pairs of jaws 36 and 39 are connected to the opposite brushes of the commutator 11. Upon a hollow shaft mounted upon shaft 40 and secured to pulley wheel 34 are mounted a pair of movable contact members 37 connected to the source of electrical energy adapted to engage the jaws of each pair of stationary members. These movable contacts are so arranged as to normally be out of contact with either pair of jaws, but upon pulling on one end of the rope 33 they will be brought into contact with jaws 36 connected with the commutator to rotate the driving shaft to hoist the load, and upon a pull on the other end of the rope to be rotated out of contact to a position again between both pairs of jaws, then upon further pull upon the same end to engage in the jaws 39 of the other pair connected so as to operate the driving shaft to lower the load. Pulling on the other end of the rope 33 the contacts are again returned to normal position.

To prevent dust and dirt entering between the teeth on the driving gear 29 a cover is secured against rotation in grooves 51 upon the outer edge of each gear 29 by the lug 2 passing through an orifice provided therefor. Upon the bottom of the cover 50 an aperture having a guide nipple 52 is provided for the passage of the rope 33.

I do not wish to limit myself to the precise construction and arrangements of parts herein shown and described as various changes may be made in the details thereof Without departing from the spirit and scope of this invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is,-

1. In an electric power hoist, a suspended electric motor, a pair of dish shaped driving gears provided with chain pulleys mounted on each side thereof, a driving pinion engaging both the gears operated by the motor, and a stationary cover between the adjacent edges of said gears.

2. In an electric power hoist, a suspended frame, a motor supported therein, a gear casing containing a chain of gears connected therewith, a driving pinion operated by said train of gears, dish shaped driving gears having outstanding chain pulleys inclosing said motor and gear casing, and engaging said driving pinion, and a stationary cover between the adjacent edges of the driving gears.

ABRAHAM C. VAN DE VELDE.

VVit-nesses J ESSICA VAN DELL'EN, MARY E. VAN GUNTEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

